You are aware that ford never had a competitive street mustang until the 68.5-70 Cobra jet and that was probably the only mustang that was competitive in street trim. Even then it probably wasn't much of a match for a 396 or 427 powered Fbody. This is coming from a guy that grew up in a Ford family, has owned many 60-70's fords....Hell my dad's nickname was FORD because thats all he would drive but I live in reality.